Shuttle check for looms



May 7, 1946'. E. A.` sN'roN 2,399,763

SHUTTLE CHECK FOR LoQMs Filed Feb. 1, 1946 FIG. 2

FIG. 5

` mvem'on ELL/0r A. SAA/mw ATTORNEY Patented May 7, 1946 UNrITEof S11-Ares oiEFICEr-f SHUTTLECHECKFOR LQOMS Elliot AfSanton, Worcester; Masse-,"assgnor to Crompton & Knowles'Loom Works, Worcester;v Massa, a corporation of Massaohiisetts ApplicationrFehruary 1, 1946, Serial No. 644,770

This invention relates to improvements :in shuttlechecks; for, looms,` of-ythe :type slinwnW in my oo-pendingapplication SerialNopGS filed August 8, 1,945, andY it is thegeneralobject of-.the

inventionto providera shuttle .cheek including; a

frictionl member-.so :controlled that. .it moves through a distanceconsiderably greaterthanlthe displace-ment. of; the shuttleebinderf` and thereby exerts a largei checking force` on 1 the shuttle,

I-IeretoforeA I have; proposed a :shuttle check mechanism for a oating'binder constructed with a part thereof connected toI one end of. a. .strap the/other end. ofwhich 'is attached. to a spring member; Stationary friction 'surfaces' .between the ends` of thenstrap resist. movement :of thelate. ter asthe binder moves forwardly' during-boxing oftheshuttlei In thatl construction. the=amount of: motion of. the. strap along' thesfrictioni surface, andythe. distortiony ofthe spring, lis -no greater than .the forward motion ofthezbinden Itis animportant objectof my present invention to provide a shuttle check in which thestrap is required'toz move a distance alongY itsy friction surface.. considerably-.in excess; of fthe t distance throughiwhich thewbinder sis' displaced'ibyvthe shuttle.. This resultaI attainas'setifortlr lhere ina'fter.` by'. fastening: one f end'v yofwtlie f strap-` to` a stationary. partA of the lays. so-vth'at.it .canf `be' 1 engaged .by a `forwardly extending-arm .ori .the like on the binder and: caused to have a motion-along the frictionV` surface' `greater :than:4 vthe #binder motion as the `shuttle-isboxed'. The v arm 'onthe like fastened to the binderacts somewhat inf-the capacity' of a movable pulley,l wherein motion of a strap or belt 4isapproximately double the' motion of the'pulley;

It is 'another object of the inventionltoi provide means for adjusting-the position'- ofthe fxed--end of thestrap alongthe lay so that the shuttle retarding effect of the shuttle check can be varied.

With these and other objects in View which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a plan View of one end of a loom lay showing a shuttle box provided with a binder and check therefor constructed according to my present invention, and wherein the binder is in normal checkingposition,

Fig. Z is a View similar to a portion of Fig. 1, but showing theshuttle boxed and the binder in its forward position,

Figse yandi-:fi :areaverticaly sectionsont lines 3-3.-and 4 4; respectively, r-Fig; y'1, looking to;- the 1eft,;and. 1 f

Figa isan .enlarged viewfon liney.5.5, Fig..;1

.lookingrtmtheiright. a

Referringiparticularly-to Figs-,f1 andfZ, I have shownv a loomf lay; ende! 0 havinga shuttlefbox; B therecnf'provided-wittea lilooihplate- .Il anda rear vertical walt iorrbox backl I2. vf The fronti of the shuttlefboxfis formed=by the floating shuttle binder-.fl3 Asf-shownlinfignl a protector. finger |54 s engages the innerorxleft -end l5: of the binder.. The finger I 4- operates :in: the :usuala manner? and exerts a rearward forcef onf the,` fleftl end- -of Vithe binder tendingf to: move, the `latterptoward the wall 12m :A guide. i6 is securedl to2 the .lay|` and receives the: left.t endri off. the -binderf :and: f limits forward movement; ofothedatterfini a direction awayf from them/"all |24.;-

The binder rcomprises fa. fronizxsteelv strip: 220 to angle.L 26 is wweldedf thereto to `define a horizontal slot1` 2 'l .extending-transversely of. the shuttle box; A.pin28..extendsthrough the vslot 2l and guides thebinder so.tha.t .the ,latter can` move forwardly and. backwardlyfbut is restricted as to.longitu din'almovement in the direction of the length .of the shuttlebox.

A bracket. 3Di'sf'bolted as. at A3l to the lay end and Ihas arvertical wall -32' infront of the rear wall fraud-extending along' the lay end I9. Integral with the wall 32 is a horizontal forwardly projecting shelf 35 from which depend right and left arcuate friction arms 36 and 31, respectively. As shown more particularly in Fig, 5 a bolt 40 extends downwardly through the plate 35 and is tapped into the upper end of a stud4l the enlarged head 42 of which at the upper end thereof is held in tight frictional engagement with the under surface of the shelf 35 by bolt 40. The stud has a depending reduced shank 43 to the lower end of which is secured a collar 44 as at 45. A nut 4E is made integral with the lower end of the stud 4I and together with the bolt 40 provides means for securing the stud 4I to the shell in adjusted angular position.

A movable strap holder 50 has a vertical wall 5| integral with a horizontal foot 52 which is rotatably mounted on the shank 43 and supported by the collar 44. A coil spring 55 surrounds the stud 4I and has the upper end thereof extending into the head 42 while the lower end thereof is bent outwardly to engage a part of the vertical wall 5| as shown for instance in Fig. 1. The effect of the spring is-toturn the strap holder 50 in a clockwise direction as viewed in Fig. 1, and the force exerted by the spring can be varied by reason of the angular adjustment of the stud 4| already described. A friction strap Y of leather r the like indicated at 56 has one end thereof secured as at l to holder 5U, and extends along friction arms 36 and 31.

'I'he matter thus far may be substantially the same as that set forth in my prior Patents Nos.

2,045,967 and 2,390,963.

In carrying my present invention into effect I provide the binder with a forwardly extending arm 60 the front part of which is rounded as at 6| to engage that part of the strap to the left of the friction arm 31. The left end of the strap is secured to a bolt 62 extending between top and bottom arms 63 and B4, respectively, on bracket 39. These latter arms are slotted as at 65, and a nut 66 and lock washer 61 hold the bolt 62 in adjusted position along the slots.

Ordinarily spring 55 holds the strap taut and keeps the binder in checking rear position, see Fig. l, with arm 60 against a stop screw 'l0 on bracket 30. When the shuttle enters the Ibox the binder is moved forwardly and as the arm 60 and rounded surface 6| advance they draw the strap to the left around the friction surfaces 36 and 3l. The amount of motion of the strap along these friction surfaces is greater than the amount of forward motion of the binder due to the fact that the left end of the strap as viewed in Fig. 1 is fixed with respect to the lay by the anchor bolt 62. The spring is therefore placed under a stress which is proportionally greater than that which would exist if the strap were fastened to the binder as in the aforesaid Patent No. 2,390,- 963. 'Ihe rounded part 6| acts somewhat in the nature of a movable pulley in that it requires the strap to move farther than does arm 60, and for this reason there is an increased checking effect on the shuttle. The amount by which motion of the strap exceeds forward motion of the binder will of course depend upon the location of the lay carried anchor bolt 62 for the left end of the strap. If for instance this anchor should be moved to the right of the position shown in Fig. 1 and be close to the arm 60, the motion of the strap will be approximately double that of the binder. By providing for the adjustment of the anchor along the lay it is possible to vary the increase of strap motion over the binder motion.

From the foregoing it will be seen that I have provided a simple form of shuttle check wherein a strap is caused to move along a friction surface for a distance greater than the displacement of the binder. This result is accomplished by having one end of the strap xed with respect to the lay and engaging the strap at a point between its ends by a part carried by the binder. The amount by which the strap motion exceeds the binder motion can be varied depending upon Ithe position of the strap anchor along the lay, but

in each of these positions the strap will be required to move farther than the binder moves when the shuttle enters the box. The excess of motion on the part of the strap over the motion of the binder not only gives an additional frictional resistance to entry of the shuttle into the box, but increased resistance is also offered by spring 55.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

l. In shuttle checking mechanism for a loom having a lay provided with a shuttle binder, a shuttle checking strap having one end thereof resiliently mounted with respect to the lay for movement relatively to the latter, holding means for the other end of the strap, friction means on the lay engaging the strap intermediate the ends thereof, a member on said binder engaging said strap between said friction means and holding means and moved by the binder at the time of shuttle boxing in a direction to cause said strap to move along said friction means, and adjusting means to secure said holding means to the lay at different distances from said friction means.

2. In checking mechanism for a loom having a lay and a shuttle binder thereon moved laterally of the lay at the time of shuttle boxing, a shuttle checking-strap, means mounting one end of said strap resiliently with respect to the lay, anchor means connecting the other end of the strap to the lay, friction means xed with respect to the lay engaging the strap between the ends thereof, means on the binder engaging the strap between said anchor means and said friction means causing the strap to move along said friction means when the binder moves laterally of the lay incident to shuttle boxing, and means to secure said anchor means to the lay in any one of a plurality of positions at different distances from said friction means.

ELLIOT A. SANTON. 

